/*
 * C/C++ KLIB Project
 * 
 * Copyright (c) 2012 Ken Zhang (cpp.china@gmail.com)
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this program; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
 * Boston, MA  02111-1307  USA
 *
 */

#include <string.h>

char *strtrim(char *str)
{
	int i, n;
	const char *charlist = " \t\r\n";
	
	n = strlen(str);
	if (n > 0) {
		for (i = n - 1; i >= 0; i--) {
			if (strchr(charlist, str[i]) != NULL)
				str[i] = '\0';
			else
				break;
		}
		
		for (i = 0; i < n; i++) {
			if (strchr(charlist, str[i]) == NULL) {
				return str + i;
			}
		}
	}
	
	return str;
}

